White Cheese Sauce

1 cup butter
3 cups shredded Monterey Jack cheese
1 cup sour cream
2 (4 ounce) cans diced green chilies, drained
Melt butter in a saucepan over medium heat.
Reduce heat to medium-low, and stir in shredded cheese until melted.
Mix in sour cream and green chilies, and cook, stirring occasionally just until heated through.
Do not allow to boil.